Automatic fire alarm



Aug. 27, 1929. H. H. DYCK AUTOMATIC FIRE ALARM 3 Sheets-Sheet Filed May 31, 1928 m T 7. M mw a 0 H w @vv IMP m H Aug. 27, 1929. H. H. DYCK AUTOMATIC FIRE ALARM s Sheets-Sheet 2 Filed May 51, 1928 INVENTOR Hcnr /H. D cK pfi Aug. 27, 1929. H. H. DYCK AUTOMATIC FIRE ALARM Filed Mai: 31, 1928 3 Sheets-Sheet 3 I fl Patented Aug. 27, 1929. r

UNITED STATES HENRY H. oven, or WINNIPEG, MANITOBA, CANADA.

AUTOMATIC FIRE ALARM.

Application filedMay 31,

This invention relates to an automatic fire alarm, primarily in the form of an alarm clock, having a suitable means of releasing a hammer whichrings a bellwhen excessive heat or flames come into contact with the same.

The primary object of this invention being to provide an inexpensive yet reliable means of warning to the householder or others when a fire occurs. The alarm may be located in a convenient place near or above the furnace so that if the flames break forth they will catch on a thread suspended on the alarm. Or a fuse and a fuse lead may be used. This will permit of the alarm being placed in any part of the house and the fuse may be located in any convenient place near the furnace and connected to the alarm by means of the said fuse lead. The burning of the thread or the melting of the wax in the fuse causes the alarm to be sounded before the fire gains any headway.

With these objects in view as will appear as the description proceeds, the invention consists in the novel construction and arrangement of parts as hereinafter more specifically set forth, claimed and shown in the accompanying drawings forming a part of this present application and in which:

Figure 1 is an exterior view ofv the automatic fire alarm. I

Figure 2 is a side View with the cover removed.

Figure 3 is a partial section view.

Figure 4 is a plan view of the mechanism.

Figure 5 is a detail View of the fuse or paraffin container.

Figure 6 is a general view showing fuse and lead.

Figure 7 is an enlarged view showing lead attached to alarm.

Figure 8 is a perspective view of a supporting bracket.

Referring more in detail to the drawings in which similar reference characters designate corresponding parts throughout the several views it will be seen that the alarm comprises a case 10 in which is placed a frame 11 and secured thereto, said frame being to support a train of gears 12, 13, and 14. A spring 15 is provided to supply the motive power. This is accomplished in the usual manner common to all similar clockwork mechanism using a ratchet wheel 16and a pawl 17 held in position by a spring 18. A rocker 19 is pivoted to the frame 11 at 20 to engage with the agitator gear 14, an arm 1928. SerialNo. 281,833.

21 supporting the hammer 22 and a similar arm 23 atright angles to arm 21 are secured to said rocker 19 so that when the rocker moves a similar motion is transferred'to the hammer 22 causing it-to strike the bell 24 which is" also supported on the frame 11.

Secured to the case and extending radially therefrom are three arms 25, 2 6 and 27 having small loops in the ends thereof through which is threaded a small thread 28 one end of whichis tied to arm 25 and the other end to the arm 23 extending from the rocker thereby preventing the mechanism from operating. Suspended midway between arms 26 and 27 on the said thread 28 is a paraffin wax container or fuse 29. This is made in the form of a thin metal tube having its ends slightly turned inwards, two small stoppers 30 are secured to the two ends of the gap in the thread 29 these are held close .together by the paraffin wax 31 which is run into the tube while hot, the stoppers 30 first being placed in position with the strings attached. When thewax cools this makes a'rigid connection between the two parts of the thread 28. Suspended from the thread 28 is an additional thread 32 which may be located in any convenient place to catch a. flame should any occur and carry the said flame to the thread 28.

WVhen it is desired to set the alarm in any place in the house other than the furnace room a slightly different apparatus is used. The hammer is held immovable by a cord 33 secured to the arm 23 and connecting the other end to a steel piano wire 34 enclosed ina copper tubing 35 and carried to a bracket 36 which is secured to the beams, walls or any other part of the building. The copper tubing 35 is fastened to the lug 37 while the wire 34 passes through a hole in said lug and is secured to the fuse 29 the other end being attached to the lug 38 by a short connection 39. A supporting arm 40 on the alarm is provided to hold one end of the copper tubing 35. A flat spring 41 is attached to said supporting arm 40 and is to uphold the wire 34 when the fuse is burned or melted thus releasing the tension on the cord 33 and permitting the alarm to be sounded. 42 is a chair bracket, having holes 43 to receive the studs 44 on the alarm, said bracket being adapted to be secured to the wall and provide a support for the alarm.

It will be seen that when the flame burns the thread 28 or causes the wax in the fuse 29 to melt, the tension on the arm 23 will be released and thus allow the rocker to be agitated causing the alarm to be sounded by means of the hammer and the bell.

It is believed that the construction and advantages of the structure shown may be apparent from the foregoing paragraphs taken in connection with the accompanyingdrawings Without further detailed description.

While the preferredembodiment of the invention has been disclosed it is understood that-minor changes in the details of construction, combination and arrangement of 00-,

operating elements may be resortedto Within the scope of What is claimed Without departin from the spirit of the invention.

Vhat I claim In an automatic fire alarm, the combination with a clock-Work mechanism for operating an alarm having an arm extending from the spring escapement rocker, of a remote control comprising a Wire having one end connected to a remote support, a tube enclosing said Wire, a support for said tube, a fusible element interposed between the ends of said Wire, a fiat spring having its outer end connected to the free end of said Wire, to pull the Wire upwardly when released, and a flexible element connecting said spring with the arm extending from thespring escapement rocker.

In testimony whereof I affix my signature.

HENRY H. DYCK. 

